Hi all,
i am quite new to Keto only being on Keto for 3 months and i like it a lot!
i am testing my Keton levels with a FreeStyle Precision Neo Ketone strips (blood test) to check what is the level of ketones in my blood every day and after i eat something that i am not sure what was in it ( like steak souce @work etc.)
I noticed that 2 hours after eating a biscuit with sugar on it ( my kids birthday… had to eat a bit…) my ketone level was 2.6 mmol/L
i was expecting to see a result under 0.5…
can anyone explain this?
my GF which is not on Keto tested 0.0 so i don’t think the device is faulty.
thanks for taking time to read me question.
Keto levels after eating sugar. when to test
naorsc
(Naor Christensen)
#1
powertrix
#2
The way I understand it is that cells will prioritize burning glucose over ketones except for a few systems. So when you eat glucose the cells will switch over if you were burning ketones. In theory, your cells wouldn’t burn through remaining ketones and then switch to glucose, it’ll just start using glucose. Since you just had one biscuit, you body stopped making ketones, but there was still some floating around that wasn’t used yet. That’s the best theory I can come up with, lol.
Jennibc
(Jennibc)
#3
I don’t know that your ketone levels would respond that quickly to ingesting food the same way your blood sugar would. I would think waiting until the next day would give you a better idea but truthfully, that’s just a guess on my part.
naorsc
(Naor Christensen)
#4
its just that in the book “The art and science of Low Carbohydrate performace” by Jeff Volek and Stephen Phinney they write regarding how many carbs one can eat (people have different response to carbs):
It is this variability that argues in favor of testing your blood ketones daily for the first few months of a low carbohydrate diet until you know how to keep yourself in the optimum ketone zone of the diagram above. (the diagram of the optimal Ketone Zone)
PaulL
(You've tried everything else; why not try bacon?)
#5
It depends on how much sugar you got. It is entirely possible that you didn’t eat sugar past your carbohydrate threshold, unless you ate several biscuits.
Table sugar, sucrose, is a glucose molecule bonded to a fructose molecule. The digestive system cleaves the sucrose into its components, which then go into the bloodstream. The fructose travels via the portal vein to the liver, where it is metabolized. The glucose just circulates through your bloodstream. The pancreas monitors the glucose level in your blood and, if there’s too much, it secretes insulin to get it out of there (too much glucose is dangerous, and can be fatal). Insulin circulating in the bloodstream at a high enough level will stop ketogenesis in the liver.
Apparently you kept your insulin low enough not to cause ketogenesis to stop. But the fructose component of sucrose has its own bad effects when consumed in quantity, so there is good reason to avoid sugar above all other carbohydrates. Fructose can have the same long-term effects on the liver as ethyl alcohol, even though it doesn’t cause the same short-term problems.
